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2
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2
1
x  3
3
1
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8
x  1
5
2
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0
x  6
7
0
x  7
8
5
x  1
9
9
x  0
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4
x  0
11
0
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12
7
x  1
13
1
x  9
14
1
x  1
15
6
x  1
16
0
x  1
17
0
x  5
18
8
x  0

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